Patients will be recruited through Akershus University Hospital, Norway as well as through media advertising in Akershus and Oslo County. The diagnoses are set by a chiropractor and a neurologist with experience in headache. In accordance with good clinical practice, all patients will receive written and oral information about the project and will be informed about the harms and benefits as well as adverse reaction of the intervention. A total of 90 participants need to be recruited to the clinical trial.